Hydraulic hub motor auxiliary drive system

Abstract

The invention provides a hydraulic auxiliary drive system by adopting wheel hub motors and solves the problems that a traditional rear drive vehicle cannot meet power performance requirements on low-adhesion coefficient road surfaces and large-slope road surfaces, and the existing wheel hub motor hydraulic drive system cannot meet the requirement for high flow of wheel hub motors. The system comprises a hydraulic pump assembly, a control valve bank, a controller, a power take-off device, a power take-off device output shaft, a left front wheel, a left wheel hub motor, a right wheel hub motor, a right front wheel and a fuel tank. Reversing valves in the control valve bank are connected through a pipeline; the reversing valves in the control valve bank are connected with the controller through an electric circuit. According to the invention, a hydraulic pump is driven by the power take-off device, the working positions of the control valve bank are switched by the controller, thus multiple work modes are formed, and control fuel of hydraulically operated reversing valves is controlled by solenoid reversing valves, to control the work states of the wheel hub motors. Reliable work of the system can be guaranteed through the control valve bank, so that the requirement for the high flow of the wheel hub motors is met.

Description

Technical field [0001] The present invention relates to a hydraulic auxiliary driving system. More specifically, the present invention relates to a hydraulic system that uses a hydraulic hub motor for auxiliary driving of front wheels. Background technique [0002] Heavy-duty trucks and engineering vehicles often operate on sandy, muddy, ice and snow and other low-coefficient roads, which require high power. In order to improve the dynamics of vehicles, traditional heavy vehicles often use all-wheel drive, but the system structure is complex and the mass is large. At present, there are proposals for all-wheel drive based on the power system structure of hybrid electric vehicles. For example, the Chinese patent publication number is CN101096180A, and the announcement date is 2008-01-02. It discloses a four-wheel drive hybrid power system that uses a power distribution system, a front drive axle, a rear drive axle, a generator and a motor to achieve four-wheel drive Technology. ...

AI Technical Summary

Problems solved by technology

[0004] The invention proposes a hydraulic wheel hub motor to solve the problem that the traditional rear-drive vehicle cannot meet the power requirements on the low adhesion coefficient road surface and the steep slope road surface, and the existing wheel hub motor hydraulic drive system cannot meet the large flow requirement of the wheel hub motor Auxiliary drive system, the present invention adopts following technical solution to realize:

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